People were invited to have a 60-second test at the G-A-Y bar in London's Soho between 12pm and 8pm.

Last December's event at the venue officially broke a Guinness World Record for the number of HIV tests conducted in an eight-hour period.

A total of 467 tests were done and around £13,000 was raised for the Elton John Aids Foundation.

The international annual campaign, symbolised with a red ribbon, is about increasing awareness of Aids, celebrating breakthroughs in treatment and remembering those who have died.

The Prime Minister has said too many people are not educated about HIV and Aids, and almost 25,000 people who have the human immunodeficiency virus are not aware they have been infected.

David Cameron said such people were not benefiting from treatment and were increasing the risk of passing on the virus.

The PM wants more people to be educated about HIV and Aids

He added: "This means up to 600 people a year could be dying from a preventable, treatable condition.

"People need to know that, diagnosed early, the outlook for most people with HIV in the UK today is a good one, thanks to the availability of effective treatment and the excellent care provided by the NHS.

"Above all, people need to know that it's never been quicker or simpler to get tested."